关键词: 超声相控阵, AD9106, 切换开关, FPGA

Abstract:

It is known that the UPA (Ultrasonic Phased Array) detecting technique has the advantages of dynamic focusing,detecting damages in objects with complex shapes,and precise defect locating.However,present detection equipments generally utilize the single chip to fabricate the single channel,and then expand it to multi-channel system,leading to low integration level and difficult maintenance.Based on the FPGA technique,a time delay algorithm and sequential control module were designed systematically,and then a large-scale UPA transmission system easy to be extended to even more than 32~128 channels was constructed based on AD9106 which consists of 4 channels in one chip and released by ADI company lately.Further,a high speed transmission/reception diverter switch was designed and configured,which can accomplish self transmit and self receive of multi array elements,and finally the complexity and size of transmission and reception hardware modules in this system was lowered tremendously,while the high pressure impulse of the transmission module was restrained.The UPA transmission system has the advantages of high integration,anti-jamming capability,detection accuracy,security as well as low power dissipation.

Key words: UPA;AD9106;diverter switch;FPGA